code-diesel
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Posts Tagged ‘algorithm’
Sorting PHP arrays with substrings
In: algorithms| data| php
10 Dec 2009Sorting PHP arrays using usort with substrings
- (4) Comments
- Tags: algorithm
Luhn algorithm for validating credit cards
In: algorithms| php
9 Jul 2008The Luhn algorithm also known as the “modulus 10″ or “mod 10″ algorithm, is a checksum formula which can be used to validate credit card numbers. Developed in the 1950’s by IBM scientist Hans Peter Luhn and described in U.S. Patent 2,950,048. A PHP implementation is shown below.
function LuhnCheck($strDigits)
{
$sum = 0;
[...]
- (1) Comment
- Tags: algorithm, php
